<template>
	<view class="page chat-box">
		<nav-bar back more @more="onShowMore">{{ title }}</nav-bar>
		<view class="chat-main-box" :style="{height: chatMainHeight+'px'}">
			<view v-if="chat.type == 'GROUP' && group.topMessage">
				<chat-top-message :group="group" :msgInfo="group.topMessage" :headImage="headImage(group.topMessage)" :showName="showName(group.topMessage)" @locate="locateMessage">
				</chat-top-message>
			</view>
			<view class="chat-msg" @click="switchChatTabBox('none')" @touchstart="onTouchChat">
				<scroll-view class="scroll-box" scroll-y="true" upper-threshold="200" @scrolltoupper="onScrollToTop" @scrolltolower="onScrollToBottom" :scroll-into-view="'chat-item-' + scrollMsgIdx">
					<view v-if="chat" v-for="(msgInfo, idx) in showMessages" :key="showMinIdx+idx">
						<chat-message-item :ref="'message'+msgInfo.id" :active="showMinIdx+idx == activeMessageIdx" :headImage="headImage(msgInfo)" @call="onRtCall(msgInfo)" :showName="showName(msgInfo)" :quoteShowName="showName(msgInfo.quoteMessage)" :group="group" @recall="onRecallMessage" @delete="onDeleteMessage" @copy="onCopyMessage" @quote="onQuoteMessage" @locateQuote="onLocateQuoteMessage" @longPressHead="onLongPressHead(msgInfo)" @download="onDownloadFile" @audioStateChange="onAudioStateChange" @top="onTopMessage" :id="'chat-item-' + (showMinIdx+idx)" :msgInfo="msgInfo" :groupMembers="groupMembers">
						</chat-message-item>
					</view>
				</scroll-view>
			</view>
			<view v-if="atUserIds.length > 0" class="chat-at-bar" @click="openAtBox()">
				<view class="iconfont icon-at">:&nbsp;</view>
				<scroll-view v-if="atUserIds.length > 0" class="chat-at-scroll-box" scroll-x="true" scroll-left="120">
					<view class="chat-at-items">
						<view v-for="m in atUserItems" class="chat-at-item" :key="m.userId">
							<head-image :name="m.showNickName" :url="m.headImage" size="minier"></head-image>
						</view>
					</view>
				</scroll-view>
			</view>
			<view class="send-bar">
				<view v-if="!showRecord" class="iconfont icon-voice-circle" @click="onRecorderInput()"></view>
				<view v-else class="iconfont icon-keyboard" @click="onKeyboardInput()"></view>
				<chat-record v-if="showRecord" class="chat-record" @send="onSendRecord"></chat-record>
				<view v-else class="send-text">
					<editor id="editor" class="send-text-area" :placeholder="isReceipt ? '[回执消息]' : ''" :read-only="isReadOnly" @focus="onEditorFocus" @blur="onEditorBlur" @ready="onEditorReady" :adjust-position="false" @input="onTextInput">
					</editor>
					<!-- <textarea class="send-text-area" v-model="sendText" 
						auto-height :show-confirm-bar="false"
						:placeholder="isReceipt ? '[回执消息]' : ''" 
						:adjust-position="true" 
						@focus="onEditorFocus" 
						@blur="onEditorBlur"
						@confirm="sendTextMessage()"
						confirm-type="send" confirm-hold
						:hold-keyboard="true"></textarea> -->
					<view v-if="quoteMessage" class="quote-message">
						<view class="quote-text">{{quoteMessageText}}</view>
						<uni-icons class="quote-remove" type="clear" size="20" color="#888" @click="onQuoteMessage(null)"></uni-icons>
					</view>
				</view>
				<view v-if="chat && chat.type == 'GROUP'" class="iconfont icon-at" @click="openAtBox()"></view>
				<view class="iconfont icon-icon_emoji" @click="onShowEmoChatTab()"></view>
				<view v-if="isEmpty" class="iconfont icon-add" @click="onShowToolsChatTab()">
				</view>
				<button v-if="!isEmpty || atUserIds.length" class="btn-send" type="primary" @touchend.prevent="sendTextMessage()" size="mini">发送</button>
			</view>
		</view>
		<view class="chat-tab-bar">
			<view v-if="chatTabBox == 'tools'" class="chat-tools" :style="{height: keyboardHeight+'px'}">
				<view class="chat-tools-item">
					<file-upload ref="fileUpload" :onBefore="onUploadFileBefore" :onSuccess="onUploadFileSuccess" :onError="onUploadFileFail">
						<view class="tool-icon iconfont icon-folder"></view>
					</file-upload>
					<view class="tool-name">文件</view>
				</view>
				<view class="chat-tools-item">
					<image-upload :maxCount="9" sourceType="album" :onBefore="onUploadImageBefore" :onSuccess="onUploadImageSuccess" :onError="onUploadImageFail">
						<view class="tool-icon iconfont icon-picture"></view>
					</image-upload>
					<view class="tool-name">相册</view>
				</view>
				<view class="chat-tools-item">
					<image-upload sourceType="camera" :onBefore="onUploadImageBefore" :onSuccess="onUploadImageSuccess" :onError="onUploadImageFail">
						<view class="tool-icon iconfont icon-camera"></view>
					</image-upload>
					<view class="tool-name">拍摄</view>
				</view>
				<view class="chat-tools-item">
					<video-upload :onBefore="onUploadVideoBefore" :onSuccess="onUploadVideoSuccess" :onError="onUploadVideoFail">
						<view class="tool-icon iconfont icon-film"></view>
					</video-upload>
					<view class="tool-name">视频</view>
				</view>
				<view class="chat-tools-item" @click="onRecorderInput()">
					<view class="tool-icon iconfont icon-microphone"></view>
					<view class="tool-name">语音消息</view>
				</view>
				<view v-if="chat.type == 'GROUP'" class="chat-tools-item" @click="switchReceipt()">
					<view class="tool-icon iconfont icon-receipt" :class="isReceipt ? 'active' : ''"></view>
					<view class="tool-name">回执消息</view>
				</view>
				<!-- #ifndef MP-WEIXIN -->
				<!-- 音视频不支持小程序 -->
				<view v-if="chat.type == 'PRIVATE'" class="chat-tools-item" @click="onPriviteVideo()">
					<view class="tool-icon iconfont icon-video"></view>
					<view class="tool-name">视频通话</view>
				</view>
				<view v-if="chat.type == 'PRIVATE'" class="chat-tools-item" @click="onPriviteVoice()">
					<view class="tool-icon iconfont icon-call"></view>
					<view class="tool-name">语音通话</view>
				</view>
				<view v-if="chat.type == 'GROUP'" class="chat-tools-item" @click="onGroupVideo()">
					<view class="tool-icon iconfont icon-call"></view>
					<view class="tool-name">语音通话</view>
				</view>
				<!-- #endif -->
			</view>
			<scroll-view v-if="chatTabBox === 'emo'" class="chat-emotion" scroll-y="true" :style="{height: keyboardHeight+'px'}">
				<view class="emotion-item-list">
					<image class="emotion-item emoji-large" :title="emoText" :src="$emo.textToPath(emoText)" v-for="(emoText, i) in $emo.emoTextList" :key="i" @click="selectEmoji(emoText)" mode="aspectFit" lazy-load="true"></image>
				</view>
			</scroll-view>
		</view>
		<!-- @用户时选择成员 -->
		<chat-at-box ref="atBox" v-if="this.chat.type == 'GROUP'" :ownerId="group.ownerId" :members="groupMembers" @complete="onAtComplete"></chat-at-box>
		<!-- 群语音通话时选择成员 -->
		<!-- #ifndef MP-WEIXIN -->
		<group-member-selector v-if="this.chat.type == 'GROUP'" ref="selBox" :members="groupMembers" :maxSize="configStore.webrtc.maxChannel" :group="group" @complete="onInviteOk"></group-member-selector>
		<group-rtc-join v-if="this.chat.type == 'GROUP'" ref="rtcJoin" :groupId="group.id"></group-rtc-join>
		<!-- #endif -->
	</view>
</template>

<script>
	import UNI_APP from '@/.env.js';

	export default {
		data() {
			return {
				chat: {},
				userInfo: {},
				groupId: null,
				groupMembers: [],
				isReceipt: false, // 是否回执消息
				scrollMsgIdx: 0, // 滚动条定位为到哪条消息
				chatTabBox: 'none',
				showRecord: false,
				chatMainHeight: 0, // 聊天窗口高度
				keyboardHeight: 290,
				windowHeight: 1000, // 窗口高度
				initHeight: 1000, // h5初始高度
				atUserIds: [],
				needScrollToBottom: false, // 需要滚动到底部 
				showMinIdx: 0, // 下标小于showMinIdx的消息不显示，否则可能很卡
				showMaxIdx: -1, // 下标大于showMaxIdx的消息不显示，否则可能很卡
				reqQueue: [], // 请求队列
				isSending: false, // 是否正在发送请求
				isShowKeyBoard: false, // 键盘是否正在弹起 
				editorCtx: null, // 编辑器上下文
				isEmpty: true, // 编辑器是否为空
				isFocus: false, // 编辑器是否焦点
				isReadOnly: false, // 编辑器是否只读
				playingAudio: null, // 当前正在播放的录音消息,
				quoteMessage: null, // 被引用的消息
				activeMessageIdx: -1 // 选中消息idx
			}
		},
		methods: {
			async onRecorderInput() {
				if (!await this.$permission.micro()) {
					console.log("录音权限未获得")
					return;
				}
				this.showRecord = true;
				this.switchChatTabBox('none');
			},
			onKeyboardInput() {
				this.showRecord = false;
				this.switchChatTabBox('none');
			},
			onSendRecord(data) {
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				let msgInfo = {
					content: JSON.stringify(data),
					type: this.$enums.MESSAGE_TYPE.AUDIO,
					receipt: this.isReceipt
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				this.sendMessageRequest(msgInfo).then((m) => {
					m.selfSend = true;
					this.chatStore.insertMessage(m, this.chat);
					// 会话置顶
					this.moveChatToTop();
					// 滚动到底部
					this.scrollToBottom();
					this.isReceipt = false;

				})
			},
			onRtCall(msgInfo) {
				if (msgInfo.type == this.$enums.MESSAGE_TYPE.ACT_RT_VOICE) {
					this.onPriviteVoice();
				} else if (msgInfo.type == this.$enums.MESSAGE_TYPE.ACT_RT_VIDEO) {
					this.onPriviteVideo();
				}
			},
			onPriviteVideo() {
				if (!this.isFriend) {
					uni.showToast({
						title: "对方已不是您的好友，无法呼叫",
						icon: 'none'
					})
					return;
				}
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				const friendInfo = encodeURIComponent(JSON.stringify(this.friend));
				uni.navigateTo({
					url: `/pages/chat/chat-private-video?mode=video&friend=${friendInfo}&isHost=true`
				})
			},
			onPriviteVoice() {
				if (!this.isFriend) {
					uni.showToast({
						title: "对方已不是您的好友，无法呼叫",
						icon: 'none'
					})
					return;
				}
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				const friendInfo = encodeURIComponent(JSON.stringify(this.friend));
				uni.navigateTo({
					url: `/pages/chat/chat-private-video?mode=voice&friend=${friendInfo}&isHost=true`
				})
			},
			onGroupVideo() {
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				this.$http({
					url: "/webrtc/group/info?groupId=" + this.group.id,
					method: 'GET'
				}).then((rtcInfo) => {
					if (rtcInfo.isChating) {
						// 已在通话中，可以直接加入通话
						this.$refs.rtcJoin.open(rtcInfo);
					} else {
						// 邀请成员发起通话
						let ids = [this.mine.id];
						this.$refs.selBox.init(ids, ids, []);
						this.$refs.selBox.open();
					}
				})
			},
			onInviteOk(ids) {
				if (ids.length < 2) {
					return;
				}
				let users = [];
				ids.forEach(id => {
					let m = this.groupMembers.find(m => m.userId == id);
					// 只取部分字段,压缩url长度
					users.push({
						id: m.userId,
						nickName: m.showNickName,
						headImage: m.headImage,
						isCamera: false,
						isMicroPhone: true
					})
				})
				const groupId = this.group.id;
				const inviterId = this.mine.id;
				const userInfos = encodeURIComponent(JSON.stringify(users));
				uni.navigateTo({
					url: `/pages/chat/chat-group-video?groupId=${groupId}&isHost=true
						&inviterId=${inviterId}&userInfos=${userInfos}`
				})
			},
			moveChatToTop() {
				let chatIdx = this.chatStore.findChatIdx(this.chat);
				this.chatStore.moveTop(chatIdx);
			},
			switchReceipt() {
				this.isReceipt = !this.isReceipt;
			},
			openAtBox() {
				this.$refs.atBox.init(this.atUserIds);
				this.$refs.atBox.open();
			},
			onAtComplete(atUserIds) {
				this.atUserIds = atUserIds;
			},
			onLongPressHead(msgInfo) {
				if (!msgInfo.selfSend && this.chat.type == "GROUP" && this.atUserIds.indexOf(msgInfo.sendId) < 0) {
					this.atUserIds.push(msgInfo.sendId);
				}
			},
			onTouchChat() {
				this.activeMessageIdx = -1;
				this.lockScrollEvent = false;
			},
			headImage(msgInfo) {
				if (this.chat.type == 'GROUP') {
					let member = this.groupMembers.find((m) => m.userId == msgInfo.sendId);
					return member ? member.headImage : "";
				} else {
					return msgInfo.selfSend ? this.mine.headImageThumb : this.chat.headImage
				}
			},
			showName(msgInfo) {
				if (!msgInfo)
					return "";
				if (this.chat.type == 'GROUP') {
					let member = this.groupMembers.find((m) => m.userId == msgInfo.sendId);
					return member ? member.showNickName : "";
				} else {
					return msgInfo.selfSend ? this.mine.nickName : this.chat.showName
				}
			},
			sendTextMessage() {
				this.editorCtx.getContents({
					success: (e) => {
						// 清空编辑框数据
						this.editorCtx.clear();
						// 检查是否被封禁
						if (this.isBanned) {
							this.showBannedTip();
							return;
						}
						let sendText = "";
						e.delta.ops.forEach((op) => {
							if (op.insert.image) {
								// emo表情
								sendText += `#${op.attributes.alt};`
							} else(
								// 文字
								sendText += op.insert
							)
						})
						if (!sendText.trim() && this.atUserIds.length == 0) {
							return uni.showToast({
								title: "不能发送空白信息",
								icon: "none"
							});
						}
						let receiptText = this.isReceipt ? "【回执消息】" : "";
						let atText = this.createAtText();
						let msgInfo = {
							content: receiptText + this.html2Escape(sendText) + atText,
							atUserIds: this.atUserIds,
							receipt: this.isReceipt,
							type: 0
						}
						if (this.quoteMessage) {
							msgInfo.quoteMessageId = this.quoteMessage.id;
						}
						// 清空@成员列表、回执标记、引用消息
						this.atUserIds = [];
						this.isReceipt = false;
						this.quoteMessage = null;
						// 填充对方id
						this.fillTargetId(msgInfo, this.chat.targetId);
						this.sendMessageRequest(msgInfo).then((m) => {
							m.selfSend = true;
							this.chatStore.insertMessage(m, this.chat);
							// 会话置顶
							this.moveChatToTop();
						}).finally(() => {
							// 滚动到底部
							this.scrollToBottom();
						});
					}
				})

			},
			createAtText() {
				let atText = "";
				this.atUserIds.forEach((id) => {
					if (id == -1) {
						atText += ` @全体成员`;
					} else {
						let member = this.groupMembers.find((m) => m.userId == id);
						if (member) {
							atText += ` @${member.showNickName}`;
						}
					}
				})
				return atText;
			},
			fillTargetId(msgInfo, targetId) {
				if (this.chat.type == "GROUP") {
					msgInfo.groupId = targetId;
				} else {
					msgInfo.recvId = targetId;
				}
			},
			scrollToBottom() {
				let size = this.messageSize;
				if (size > 0) {
					this.scrollToMsgIdx(size - 1);
				}
			},
			scrollToMsgIdx(idx) {
				// 如果scrollMsgIdx值没变化，滚动条不会移动
				if (idx == this.scrollMsgIdx && idx > 0) {
					this.$nextTick(() => {
						// 先滚动到上一条
						this.scrollMsgIdx = idx - 1;
						// 再滚动目标位置
						this.scrollToMsgIdx(idx);
					});
					return;
				}
				this.$nextTick(() => {
					this.scrollMsgIdx = idx;
				});
			},
			onShowEmoChatTab() {
				this.showRecord = false;
				this.switchChatTabBox('emo')
			},
			onShowToolsChatTab() {
				this.showRecord = false;
				this.switchChatTabBox('tools')
			},
			switchChatTabBox(chatTabBox) {
				this.chatTabBox = chatTabBox;
				this.reCalChatMainHeight();
				if (chatTabBox != 'tools' && this.$refs.fileUpload) {
					this.$refs.fileUpload.hide()
				}
			},
			selectEmoji(emoText) {
				let path = this.$emo.textToPath(emoText)
				// 先把键盘禁用了，否则会重新弹出键盘
				this.isReadOnly = true;
				this.isEmpty = false;
				this.$nextTick(() => {
					this.editorCtx.insertImage({
						src: path,
						alt: emoText,
						extClass: 'emoji-small',
						nowrap: true,
						complete: () => {
							this.isReadOnly = false;
							this.editorCtx.blur();
						}
					});
				})
			},
			onUploadImageBefore(file) {
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				let data = {
					originUrl: file.path,
					thumbUrl: file.path
				}
				let msgInfo = {
					id: 0,
					tmpId: this.generateId(),
					fileId: file.uid,
					sendId: this.mine.id,
					content: JSON.stringify(data),
					sendTime: new Date().getTime(),
					selfSend: true,
					type: this.$enums.MESSAGE_TYPE.IMAGE,
					readedCount: 0,
					loadStatus: "loading",
					status: this.$enums.MESSAGE_STATUS.UNSEND
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				// 插入消息
				this.chatStore.insertMessage(msgInfo, this.chat);
				// 会话置顶
				this.moveChatToTop();
				// 借助file对象保存
				file.msgInfo = msgInfo;
				file.chat = this.chat;
				// 滚到最低部
				this.scrollToBottom();
				return true;
			},
			onUploadImageSuccess(file, res) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.content = JSON.stringify(res.data);
				msgInfo.receipt = this.isReceipt
				this.sendMessageRequest(msgInfo).then((m) => {
					msgInfo.loadStatus = 'ok';
					msgInfo.id = m.id;
					this.isReceipt = false;
					console.log("this.chat:", this.chat.targetId)
					this.chatStore.insertMessage(msgInfo, file.chat);
				})
			},
			onUploadImageFail(file, err) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.loadStatus = 'fail';
				this.chatStore.insertMessage(msgInfo, file.chat);
			},
			onUploadVideoBefore(file) {
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				let data = {
					videoUrl: file.tempFilePath,
					coverUrl: ""
				}
				let msgInfo = {
					id: 0,
					tmpId: this.generateId(),
					fileId: file.uid,
					sendId: this.mine.id,
					content: JSON.stringify(data),
					sendTime: new Date().getTime(),
					selfSend: true,
					type: this.$enums.MESSAGE_TYPE.VIDEO,
					readedCount: 0,
					loadStatus: "loading",
					status: this.$enums.MESSAGE_STATUS.UNSEND
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				// 插入消息
				this.chatStore.insertMessage(msgInfo, this.chat);
				// 会话置顶
				this.moveChatToTop();
				// 借助file对象保存
				file.msgInfo = msgInfo;
				file.chat = this.chat;
				// 滚到最低部
				this.scrollToBottom();
				return true;
			},
			onUploadVideoSuccess(file, res) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.content = JSON.stringify(res.data);
				msgInfo.receipt = this.isReceipt
				this.sendMessageRequest(msgInfo).then((m) => {
					msgInfo.loadStatus = 'ok';
					msgInfo.id = m.id;
					this.isReceipt = false;
					this.chatStore.insertMessage(msgInfo, file.chat);
				})
			},
			onUploadVideoFail(file, err) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.loadStatus = 'fail';
				this.chatStore.insertMessage(msgInfo, file.chat);
			},
			onUploadFileBefore(file) {
				// 检查是否被封禁
				if (this.isBanned) {
					this.showBannedTip();
					return;
				}
				let data = {
					name: file.name,
					size: file.size,
					url: file.path
				}
				let msgInfo = {
					id: 0,
					tmpId: this.generateId(),
					sendId: this.mine.id,
					content: JSON.stringify(data),
					sendTime: new Date().getTime(),
					selfSend: true,
					type: this.$enums.MESSAGE_TYPE.FILE,
					readedCount: 0,
					loadStatus: "loading",
					status: this.$enums.MESSAGE_STATUS.UNSEND
				}
				// 填充对方id
				this.fillTargetId(msgInfo, this.chat.targetId);
				// 插入消息
				this.chatStore.insertMessage(msgInfo, this.chat);
				// 会话置顶
				this.moveChatToTop();
				// 借助file对象保存
				file.msgInfo = msgInfo;
				file.chat = this.chat;
				// 滚到最低部
				this.scrollToBottom();
				return true;
			},
			onUploadFileSuccess(file, res) {
				let data = {
					name: file.name,
					size: file.size,
					url: res.data
				}
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.content = JSON.stringify(data);
				msgInfo.receipt = this.isReceipt
				this.sendMessageRequest(msgInfo).then((m) => {
					msgInfo.loadStatus = 'ok';
					msgInfo.id = m.id;
					this.isReceipt = false;
					this.chatStore.insertMessage(msgInfo, file.chat);
				})
			},
			onUploadFileFail(file, res) {
				let msgInfo = JSON.parse(JSON.stringify(file.msgInfo));
				msgInfo.loadStatus = 'fail';
				this.chatStore.insertMessage(msgInfo, file.chat);
			},
			onDeleteMessage(msgInfo) {
				uni.showModal({
					title: '删除消息',
					content: '确认删除消息?',
					success: (res) => {
						if (!res.cancel) {
							this.chatStore.deleteMessage(msgInfo, this.chat);
							uni.showToast({
								title: "删除成功",
								icon: "none"
							})
						}
					}
				})
			},
			onRecallMessage(msgInfo) {
				uni.showModal({
					title: '撤回消息',
					content: '确认撤回消息?',
					success: (res) => {
						if (!res.cancel) {
							let url = `/message/${this.chat.type.toLowerCase()}/recall/${msgInfo.id}`
							this.$http({
								url: url,
								method: 'DELETE'
							}).then((m) => {
								m.selfSend = true;
								this.chatStore.recallMessage(m, this.chat);
							})
						}
					}
				})
			},
			onQuoteMessage(msgInfo) {
				this.quoteMessage = msgInfo;
				this.onKeyboardInput();
			},
			onTopMessage(msgInfo) {
				if (!msgInfo.id) {
					uni.showToast({
						title: "请等待该消息发送成功后操作",
						icon: 'none'
					})
					return;
				}
				this.$http({
					url: `/group/setTopMessage/${msgInfo.groupId}?messageId=${msgInfo.id}`,
					method: 'POST'
				}).then(() => {

				})
			},
			onCopyMessage(msgInfo) {
				uni.setClipboardData({
					data: msgInfo.content,
					success: () => {
						uni.showToast({ title: '复制成功' });
					},
					fail: () => {
						uni.showToast({ title: '复制失败', icon: 'none' });
					}
				});
			},
			onLocateQuoteMessage(msgInfo) {
				this.locateMessage(msgInfo.quoteMessage);
			},
			locateMessage(msgInfo) {
				// 寻找消息位置
				const idx = this.findMessageIdx(msgInfo);
				if (idx < 0) {
					uni.showToast({
						title: "无法定位原消息",
						icon: 'none'
					})
					return;
				}
				// 要定位到消息，首先要显示这条消息
				if (this.showMinIdx > idx) {
					this.showMinIdx = Math.min(this.showMinIdx, Math.max(idx - 5, 0));
					this.showMaxIdx = this.showMinIdx + 20;
				}
				// 滚动至引用消息，-2是将引用消息定位到第4行
				this.scrollToMsgIdx(Math.max(this.showMinIdx, idx - 3));
				// 高亮消息2秒,提醒用户
				this.activeMessageIdx = idx;
				// 锁定滚动事件,避免干扰
				this.lockScrollEvent = true;
				// 2s后自动恢复正常
				setTimeout(() => {
					this.activeMessageIdx = -1;
					this.lockScrollEvent = false;
				}, 2000)
			},
			findMessageIdx(msgInfo) {
				for (let idx in this.chat.messages) {
					const message = this.chat.messages[idx];
					// 通过id判断
					if (msgInfo.id && message.id && message.id == msgInfo.id) {
						return idx;
					}
					// 正在发送中的消息可能没有id,只有tmpId
					if (msgInfo.tmpId && message.tmpId && message.tmpId == msgInfo.tmpId) {
						return idx;
					}
				}
				return -1;

			},
			onDownloadFile(msgInfo) {
				let url = JSON.parse(msgInfo.content).url;
				uni.downloadFile({
					url: url,
					success(res) {
						if (res.statusCode === 200) {
							var filePath = encodeURI(res.tempFilePath);
							uni.openDocument({
								filePath: filePath,
								showMenu: true
							});
						}
					},
					fail(e) {
						uni.showToast({
							title: "文件下载失败",
							icon: "none"
						})
					}
				});
			},
			onScrollToTop() {
				if (this.lockScrollEvent || this.showMinIdx == 0) {
					return;
				}
				//  #ifndef H5
				// 防止滚动条定格在顶部，不能一直往上滚
				this.scrollToMsgIdx(this.showMinIdx);
				// #endif
				// 多展示20条信息
				this.showMinIdx = this.showMinIdx > 20 ? this.showMinIdx - 20 : 0;
			},
			onScrollToBottom(e) {
				if (this.lockScrollEvent || this.showMaxIdx < 0) {
					return;
				}
				// 多展示20条信息
				this.showMaxIdx += 20;
			},
			onShowMore() {
				if (this.chat.type == "GROUP") {
					uni.navigateTo({
						url: "/pages/group/group-info?id=" + this.group.id
					})
				} else {
					uni.navigateTo({
						url: "/pages/common/user-info?id=" + this.userInfo.id
					})
				}
			},
			onTextInput(e) {
				this.isEmpty = e.detail.html == '<p><br></p>'
			},
			onEditorReady() {
				this.$nextTick(() => {
					const query = uni.createSelectorQuery().in(this);
					query.select('#editor').context((res) => {
						this.editorCtx = res.context
					}).exec()
				})
			},
			onEditorFocus(e) {
				this.isFocus = true;
				this.scrollToBottom()
				this.switchChatTabBox('none')

			},
			onEditorBlur(e) {
				this.isFocus = false;
			},
			onAudioStateChange(state, msgInfo) {
				const playingAudio = this.$refs['message' + msgInfo.id][0]
				if (state == 'PLAYING' && playingAudio != this.playingAudio) {
					// 停止之前的录音
					this.playingAudio && this.playingAudio.stopPlayAudio();
					// 记录当前正在播放的消息
					this.playingAudio = playingAudio;
				}
			},
			resetShowMessages() {
				// 初始状态仅渲染最后20条数据
				this.showMinIdx = this.messageSize > 20 ? this.messageSize - 20 : 0;
				this.showMaxIdx = -1;
			},
			loadReaded(fid) {
				this.$http({
					url: `/message/private/maxReadedId?friendId=${fid}`,
					method: 'get'
				}).then((id) => {
					this.chatStore.readedMessage({
						friendId: fid,
						maxId: id
					});
				});
			},
			readedMessage() {
				if (this.unreadCount == 0) {
					return;
				}
				let url = ""
				if (this.chat.type == "GROUP") {
					url = `/message/group/readed?groupId=${this.chat.targetId}`
				} else {
					url = `/message/private/readed?friendId=${this.chat.targetId}`
				}
				this.$http({
					url: url,
					method: 'PUT'
				}).then(() => {
					this.chatStore.resetUnreadCount(this.chat)
					this.scrollToBottom();
				})
			},
			loadGroup(groupId) {
				this.groupId = groupId;
				this.$http({
					url: `/group/find/${groupId}`,
					method: 'GET'
				}).then((group) => {
					this.chatStore.updateChatFromGroup(group);
					this.groupStore.updateGroup(group);
				});

				this.$http({
					url: `/group/members/${groupId}`,
					method: 'GET'
				}).then((groupMembers) => {
					this.groupMembers = groupMembers;
				});
			},
			updateFriendInfo() {
				if (this.isFriend) {
					// store的数据不能直接修改，深拷贝一份store的数据
					let friend = JSON.parse(JSON.stringify(this.friend));
					friend.headImage = this.userInfo.headImageThumb;
					friend.nickName = this.userInfo.nickName;
					friend.showNickName = friend.remarkNickName ? friend.remarkNickName : friend.nickName;
					// 更新好友列表中的昵称和头像
					this.friendStore.updateFriend(friend);
					// 更新会话中的头像和昵称
					this.chatStore.updateChatFromFriend(friend);
				} else {
					this.chatStore.updateChatFromUser(this.userInfo);
				}
			},
			loadFriend(friendId) {
				// 获取好友用户信息
				this.$http({
					url: `/user/find/${friendId}`,
					method: 'GET'
				}).then((userInfo) => {
					this.userInfo = userInfo;
					this.updateFriendInfo();
				})
			},
			rpxTopx(rpx) {
				// rpx转换成rpx
				let info = uni.getSystemInfoSync()
				let px = info.windowWidth * rpx / 750;
				return Math.floor(rpx);
			},
			html2Escape(strHtml) {
				return strHtml.replace(/[<>&"]/g, function(c) {
					return {
						'<': '&lt;',
						'>': '&gt;',
						'&': '&amp;',
						'"': '&quot;'
					} [c];
				});
			},
			sendMessageRequest(msgInfo) {
				return new Promise((resolve, reject) => {
					// 请求入队列，防止请求"后发先至"，导致消息错序
					this.reqQueue.push({ msgInfo, resolve, reject });
					this.processReqQueue();
				})
			},
			processReqQueue() {
				if (this.reqQueue.length && !this.isSending) {
					this.isSending = true;
					const reqData = this.reqQueue.shift();
					this.$http({
						url: this.messageAction,
						method: 'post',
						data: reqData.msgInfo
					}).then((res) => {
						reqData.resolve(res)
					}).catch((e) => {
						reqData.reject(e)
					}).finally(() => {
						this.isSending = false;
						// 发送下一条请求
						this.processReqQueue();
					})
				}
			},
			reCalChatMainHeight() {
				setTimeout(() => {
					let h = this.windowHeight;
					// 减去标题栏高度
					h -= 50;
					// 减去键盘高度
					if (this.isShowKeyBoard || this.chatTabBox != 'none') {
						console.log("减去键盘高度:", this.keyboardHeight)
						h -= this.keyboardHeight;
						this.scrollToBottom();
					}
					// #ifndef H5
					// h5需要减去状态栏高度
					h -= uni.getSystemInfoSync().statusBarHeight;
					// #endif
					this.chatMainHeight = h;
					console.log("窗口高度:", this.chatMainHeight)
					if (this.isShowKeyBoard || this.chatTabBox != 'none') {
						this.scrollToBottom();
					}
					// ios浏览器键盘把页面顶起后，页面长度不会变化，这里把页面拉到顶部适配一下
					// #ifdef H5
					if (uni.getSystemInfoSync().platform == 'ios') {
						// 不同手机需要的延时时间不一致，采用分段延时的方式处理
						const delays = [50, 100, 500];
						delays.forEach((delay) => {
							setTimeout(() => {
								uni.pageScrollTo({
									scrollTop: 0,
									duration: 10
								});
							}, delay);
						})
					}
					// #endif
				}, 30)
			},
			listenKeyBoard() {
				// #ifdef H5
				if (navigator.platform == "Win32" || navigator.platform == "MacIntel") {
					// 电脑端不需要弹出键盘
					console.log("navigator.platform:", navigator.platform)
					return;
				}
				if (uni.getSystemInfoSync().platform == 'ios') {
					// ios h5实现键盘监听
					window.addEventListener('focusin', this.focusInListener);
					window.addEventListener('focusout', this.focusOutListener);
					// 监听键盘高度，ios13以上开始支持
					if (window.visualViewport) {
						window.visualViewport.addEventListener('resize', this.resizeListener);
					}
				} else {
					// 安卓h5实现键盘监听
					window.addEventListener('resize', this.resizeListener);
				}
				// #endif
				// #ifndef H5
				// app实现键盘监听
				uni.onKeyboardHeightChange(this.keyBoardListener);
				// #endif
			},
			unListenKeyboard() {
				// #ifdef H5
				window.removeEventListener('resize', this.resizeListener);
				window.removeEventListener('focusin', this.focusInListener);
				window.removeEventListener('focusout', this.focusOutListener);
				// #endif
				// #ifndef H5
				uni.offKeyboardHeightChange(this.keyBoardListener);
				// #endif
			},
			keyBoardListener(res) {
				this.isShowKeyBoard = res.height > 0;
				if (this.isShowKeyBoard) {
					this.keyboardHeight = res.height; // 获取并保存键盘高度
				}
				this.reCalChatMainHeight();
			},
			resizeListener() {
				console.log("resize:", window.innerHeight)
				let keyboardHeight = this.initHeight - window.innerHeight;
				this.isShowKeyBoard = keyboardHeight > 150;
				if (this.isShowKeyBoard) {
					this.keyboardHeight = keyboardHeight;
				}
				this.reCalChatMainHeight();
			},
			focusInListener() {
				console.log("focusInListener")
				this.isShowKeyBoard = true;
				this.reCalChatMainHeight();
			},
			focusOutListener() {
				console.log("focusOutListener")
				this.isShowKeyBoard = false;
				this.reCalChatMainHeight();
			},
			showBannedTip() {
				let msgInfo = {
					tmpId: this.generateId(),
					sendId: this.mine.id,
					sendTime: new Date().getTime(),
					type: this.$enums.MESSAGE_TYPE.TIP_TEXT
				}
				if (this.chat.type == "PRIVATE") {
					msgInfo.recvId = this.mine.id
					msgInfo.content = "该用户已被管理员封禁,原因:" + this.userInfo.reason
				} else {
					msgInfo.groupId = this.group.id;
					msgInfo.content = "本群聊已被管理员封禁,原因:" + this.group.reason
				}
				this.chatStore.insertMessage(msgInfo, this.chat);
			},
			generateId() {
				// 生成临时id 
				return String(new Date().getTime()) + String(Math.floor(Math.random() * 1000));
			}
		},
		computed: {
			mine() {
				return this.userStore.userInfo;
			},
			isFriend() {
				return this.friendStore.isFriend(this.userInfo.id);
			},
			friend() {
				return this.friendStore.findFriend(this.userInfo.id);
			},
			group() {
				return this.groupStore.findGroup(this.groupId)
			},
			title() {
				if (!this.chat) {
					return "";
				}
				let title = this.chat.showName;
				if (this.chat.type == "GROUP") {
					let size = this.groupMembers.filter(m => !m.quit).length;
					title += `(${size})`;
				}
				return title;
			},
			messageAction() {
				return `/message/${this.chat.type.toLowerCase()}/send`;
			},
			messageSize() {
				if (!this.chat || !this.chat.messages) {
					return 0;
				}
				return this.chat.messages.length;
			},
			showMessages() {
				if (this.showMaxIdx > 0) {
					return this.chat.messages.slice(this.showMinIdx, this.showMaxIdx)
				} else {
					return this.chat.messages.slice(this.showMinIdx)
				}

			},
			unreadCount() {
				if (!this.chat || !this.chat.unreadCount) {
					return 0;
				}
				return this.chat.unreadCount;
			},
			isBanned() {
				return (this.chat.type == "PRIVATE" && this.userInfo.isBanned) ||
					(this.chat.type == "GROUP" && this.group.isBanned)
			},
			isOwner() {
				this.group.ownerId == this.mine.id;
			},
			isMuted() {
				return this.chat.type == "GROUP" && this.group.isMuted && !this.isOwner
			},
			atUserItems() {
				let atUsers = [];
				this.atUserIds.forEach((id) => {
					if (id == -1) {
						atUsers.push({
							id: -1,
							showNickName: "全体成员"
						})
						return;
					}
					let member = this.groupMembers.find((m) => m.userId == id);
					if (member) {
						atUsers.push(member);
					}
				})
				return atUsers;
			},
			quoteMessageText() {
				if (!this.quoteMessage)
					return "";
				const showName = this.showName(this.quoteMessage);
				let content = this.quoteMessage.content;
				switch (this.quoteMessage.type) {
					case this.$enums.MESSAGE_TYPE.IMAGE:
						content = "[图片]";
						break;
					case this.$enums.MESSAGE_TYPE.VIDEO:
						content = "[视频]";
						break;
					case this.$enums.MESSAGE_TYPE.FILE:
						content = "[文件] " + JSON.parse(this.quoteMessage.content).name;
						break;
					case this.$enums.MESSAGE_TYPE.AUDIO:
						content = "[语音] " + JSON.parse(this.quoteMessage.content).duration + '"';
						break;
				}
				return showName + ": " + content;
			}
		},
		watch: {
			messageSize: function(newSize, oldSize) {
				// 接收到消息时滚动到底部
				if (newSize > oldSize) {
					let pages = getCurrentPages();
					let curPage = pages[pages.length - 1].route;
					if (curPage == "pages/chat/chat-box") {
						// 收到普通消息,则滚动至底部
						let lastMessage = this.chat.messages[newSize - 1];
						if (oldSize == 0 || this.$msgType.isNormal(lastMessage.type)) {
							this.scrollToBottom();
						}
					} else {
						this.needScrollToBottom = true;
					}
				}
			},
			unreadCount: {
				handler(newCount, oldCount) {
					if (newCount > 0) {
						// 消息已读
						this.readedMessage()
					}
				}
			}
		},
		onLoad(options) {
			// 聊天数据
			this.chat = this.chatStore.chats[options.chatIdx];
			// 初始状态只显示20条消息
			this.resetShowMessages();
			// 消息已读
			this.readedMessage()
			// 加载好友或群聊信息
			if (this.chat.type == "GROUP") {
				this.loadGroup(this.chat.targetId);
			} else {
				this.loadFriend(this.chat.targetId);
				this.loadReaded(this.chat.targetId)
			}
			// 激活当前会话
			this.chatStore.activeChat(options.chatIdx);
			// 复位回执消息
			this.isReceipt = false;
			// 清空引用消息
			this.quoteMessage = null;
			// 监听键盘高度
			this.listenKeyBoard();
			// 计算聊天窗口高度
			this.$nextTick(() => {
				this.windowHeight = uni.getSystemInfoSync().windowHeight;
				this.reCalChatMainHeight()
				// 兼容ios h5:禁止页面滚动
				// #ifdef H5
				this.initHeight = window.innerHeight;
				document.body.addEventListener('touchmove', function(e) {
					e.preventDefault();
				}, { passive: false });
				// #endif
			});
		},
		onUnload() {
			this.unListenKeyboard();
		},
		onShow() {
			if (this.needScrollToBottom) {
				// 页面滚到底部
				this.scrollToBottom();
				this.needScrollToBottom = false;
			}
		}
	}
</script>

<style lang="scss">
	.chat-box {
		$icon-color: rgba(0, 0, 0, 0.88);
		position: relative;
		background-color: #fafafa;

		.header {
			display: flex;
			justify-content: center;
			align-items: center;
			height: 60rpx;
			padding: 5px;
			background-color: #fafafa;
			line-height: 50px;
			font-size: $im-font-size-large;
			box-shadow: $im-box-shadow-lighter;
			z-index: 1;

			.btn-side {
				position: absolute;
				line-height: 60rpx;
				cursor: pointer;

				&.right {
					right: 30rpx;
				}
			}
		}

		.chat-main-box {
			// #ifdef H5
			top: $im-nav-bar-height;
			// #endif
			// #ifndef H5
			top: calc($im-nav-bar-height + var(--status-bar-height));
			// #endif
			position: fixed;
			width: 100%;
			display: flex;
			flex-direction: column;
			z-index: 2;

			.chat-msg {
				flex: 1;
				padding: 0;
				overflow: hidden;
				position: relative;
				background-color: white;

				.scroll-box {
					height: 100%;
				}
			}

			.chat-at-bar {
				display: flex;
				align-items: center;
				padding: 0 10rpx;

				.icon-at {
					font-size: $im-font-size-larger;
					color: $im-color-primary;
					font-weight: bold;
				}

				.chat-at-scroll-box {
					flex: 1;
					width: 80%;

					.chat-at-items {
						display: flex;
						align-items: center;
						height: 70rpx;

						.chat-at-item {
							padding: 0 3rpx;
						}
					}
				}

			}



			.send-bar {
				display: flex;
				align-items: center;
				padding: 10rpx;
				border-top: $im-border solid 1px;
				background-color: $im-bg;
				min-height: 80rpx;
				margin-bottom: 14rpx;

				.iconfont {
					font-size: 60rpx;
					margin: 0 10rpx;
					color: $icon-color;
				}

				.chat-record {
					flex: 1;
				}

				.send-text {
					flex: 1;
					overflow: auto;
					padding: 14rpx 20rpx;
					background-color: #fff;
					border-radius: 8rpx;
					font-size: $im-font-size;
					box-sizing: border-box;
					margin: 0 10rpx;
					position: relative;

					.send-text-area {
						width: 100%;
						height: 100%;
						min-height: 40rpx;
						max-height: 200rpx;
						font-size: 30rpx;
					}

					.quote-message {
						background: #eee;
						padding: 5rpx;
						display: flex;
						align-items: center;
						border-radius: 10rpx;

						.quote-text {
							flex: 1;
							white-space: nowrap;
							overflow: hidden;
							text-overflow: ellipsis;
							font-size: $im-font-size-smaller;
							color: $im-text-color-lighter;
						}

					}
				}

				.btn-send {
					margin: 5rpx;
				}
			}
		}

		.chat-tab-bar {
			position: fixed;
			bottom: 0;
			background-color: $im-bg;

			.chat-tools {
				display: flex;
				flex-wrap: wrap;
				align-items: top;
				height: 310px;
				padding: 40rpx;
				box-sizing: border-box;

				.chat-tools-item {
					width: 25%;
					padding: 16rpx;
					box-sizing: border-box;
					display: flex;
					flex-direction: column;
					align-items: center;

					.tool-icon {
						padding: 26rpx;
						font-size: 54rpx;
						border-radius: 20%;
						background-color: white;
						color: $icon-color;

						&:active {
							background-color: $im-bg-active;
						}
					}

					.tool-name {
						height: 60rpx;
						line-height: 60rpx;
						font-size: 28rpx;
					}
				}
			}

			.chat-emotion {
				height: 310px;
				padding: 20rpx;
				box-sizing: border-box;

				.emotion-item-list {
					display: flex;
					flex-wrap: wrap;
					justify-content: space-between;
					align-content: center;

					.emotion-item {
						text-align: center;
						cursor: pointer;
						padding: 5px;
					}
				}
			}

		}
	}
</style>